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Cisco 3825 Mobile Wireless Edge Router Software Configuration Guide
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Chapter 2 Cisco IOS Software Basics
Undoing a Command or Feature
Undoing a Command or Feature
If you want to undo a command that you entered or if you want to disable a feature, enter the keyword
no before most commands; for example, no ip routing.
Saving Configuration Changes
You m us t e nt er t he copy running-config startup-config command to save your configuration changes
to NVRAM, so that the changes are not lost if there is a system reload or power outage. For example:
Router# copy running-config startup-config
Building configuration...
It might take a few minutes to save the configuration to nonvolatile random-access memory (NVRAM).
After the configuration has been saved, the following message appears:
[OK]
Router#
Where to Go Next
Now that you know some Cisco IOS software basics, you can begin to configure the router by using the
CLI.
Remember the following:
• You can use the question mark (?) and arrow keys to help you enter commands.
• Each command mode restricts you to a set of commands. If you have difficulty entering a command,
check the prompt and then enter the question mark (?) to see a list of available commands. You might
be in the wrong command mode or be using the incorrect syntax.
• To disable a feature, enter the keyword no before the command; for example, no ip routing.
• You need to save your configuration changes to NVRAM so that the changes are not lost if there is
a system reload or power outage.
Proceed to Chapter 3, “First-Time Configuration,” for first time configuration. Otherwise, proceed to
Chapter 4, “Configuring the Cisco 3825 Mobile Wireless Edge Router in a RAN-O Solution with the
Command-Line Interface,” to begin configuring the router.